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Finding the Fourth Proportional to 118,085.65, 177,090.10 and 39,178.69

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Solution

The fourth proportional to 118,085.65, 177,090.10 and 39,178.69 is: 58,755.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,085.65 : 177,090.10 = 39,178.69 : x
  2. Step 2: Convert to fraction form
    118,085.65/177,090.10 = 39,178.69/x
  3. Step 3: Cross multiply
    118,085.65x = 177,090.10 × 39,178.69
  4. Step 4: Simplify right side
    118,085.65x = 6,938,157,589.30
  5. Step 5: Solve for x
    x = 6,938,157,589.30/118,085.65
  6. Step 6: Final answer
    x = 58,755.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.